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<li class="navelem"><a class="el" href="../../dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li>  </ul>
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  <div class="headertitle"><div class="title">sha256.cpp</div></div>
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<a href="../../d4/d08/sha256_8cpp.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span> </div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="preprocessor">#include &lt;sstream&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="preprocessor">#include &quot;<a class="code" href="../../d5/d68/sha256_8hpp.html">sha256.hpp</a>&quot;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span> </div>
<div class="foldopen" id="foldopen00007" data-start="{" data-end="}">
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#a8275ad003a96033afe793714971d2a32">    7</a></span><a class="code hl_function" href="../../d4/dca/classsha256.html#a8275ad003a96033afe793714971d2a32">sha256::sha256</a>(): p_ctx__( nullptr )</div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span>{</div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span>    p_ctx__ = EVP_MD_CTX_new();</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span>    EVP_DigestInit_ex(p_ctx__, EVP_sha256(), <span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span>}</div>
</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span> </div>
<div class="foldopen" id="foldopen00013" data-start="{" data-end="}">
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#a3d5eff1f9832010be5dbb071d86aa36d">   13</a></span>sha256 :: ~sha256()</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span>{</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span>    <span class="keywordflow">if</span>( p_ctx__ ){</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span>        EVP_MD_CTX_free( p_ctx__ );</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span>    }</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span>}</div>
</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span> </div>
<div class="foldopen" id="foldopen00021" data-start="{" data-end="}">
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#a4e11f7081101f72f665f22e1fb497e1a">   21</a></span>sha256 :: sha256( <span class="keyword">const</span> std::string&amp; data ): p_ctx__( nullptr )</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span>{</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span>    p_ctx__ = EVP_MD_CTX_new();</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>    EVP_DigestInit_ex(p_ctx__, EVP_sha256(), <span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span>    <a class="code hl_function" href="../../d4/dca/classsha256.html#aa259a4203e4d8aa9a6ccf48f86b8b86d">update</a>( data.c_str() , data.length() );</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span>}</div>
</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="foldopen" id="foldopen00029" data-start="{" data-end="}">
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#a70d700b72d1275c6f9673b2211d5eee4">   29</a></span>sha256 :: sha256( <span class="keywordtype">void</span> * data , <span class="keywordtype">size_t</span> len ): p_ctx__( nullptr )</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>{</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>    p_ctx__ = EVP_MD_CTX_new();</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>    EVP_DigestInit_ex(p_ctx__, EVP_sha256(), <span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>    <a class="code hl_function" href="../../d4/dca/classsha256.html#aa259a4203e4d8aa9a6ccf48f86b8b86d">update</a>( data , len );</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>}</div>
</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span> </div>
<div class="foldopen" id="foldopen00037" data-start="{" data-end="}">
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#aa259a4203e4d8aa9a6ccf48f86b8b86d">   37</a></span><span class="keywordtype">void</span> sha256 :: update( <span class="keyword">const</span> <span class="keywordtype">void</span> * data , <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>{</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>    EVP_DigestUpdate( p_ctx__, data, len );</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>}</div>
</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="foldopen" id="foldopen00042" data-start="{" data-end="}">
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"><a class="line" href="../../d4/dca/classsha256.html#a24d456b943b598e0a94432f78ab57e73">   42</a></span>std::string sha256 :: finish()</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>{</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>    std::string ret;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>    <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> hash[EVP_MAX_MD_SIZE];</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    <span class="keywordtype">char</span> hash_str[ 2 * EVP_MAX_MD_SIZE ];</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>    uint32_t hashSize = 0;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>    <span class="keywordtype">int</span> rc = EVP_DigestFinal_ex(p_ctx__, hash, &amp;hashSize);</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>    <span class="keywordflow">if</span>( rc != 0 ){</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>        <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>    }</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>    <span class="keywordflow">for</span>( uint32_t i = 0; i &lt; hashSize; ++i ){</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>        sprintf( hash_str + ( i &lt;&lt; 1 ) , <span class="stringliteral">&quot;%02X&quot;</span> , hash[i] );</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>    }</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>}</div>
</div>
<div class="ttc" id="aclasssha256_html_a8275ad003a96033afe793714971d2a32"><div class="ttname"><a href="../../d4/dca/classsha256.html#a8275ad003a96033afe793714971d2a32">sha256::sha256</a></div><div class="ttdeci">sha256()</div><div class="ttdef"><b>定义</b> <a href="#l00007">sha256.cpp:7</a></div></div>
<div class="ttc" id="aclasssha256_html_aa259a4203e4d8aa9a6ccf48f86b8b86d"><div class="ttname"><a href="../../d4/dca/classsha256.html#aa259a4203e4d8aa9a6ccf48f86b8b86d">sha256::update</a></div><div class="ttdeci">void update(const void *data, size_t len)</div><div class="ttdef"><b>定义</b> <a href="#l00037">sha256.cpp:37</a></div></div>
<div class="ttc" id="asha256_8hpp_html"><div class="ttname"><a href="../../d5/d68/sha256_8hpp.html">sha256.hpp</a></div></div>
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